We experienced a rock burst in the 168 stope on 4600 level which shattered rock on the footwall rib approximately 2' to 4' deep for a distance of about 16' in length. Rock also appeared to have been pushed up from the sill creating a muckpile approximately 3' to 4'high. There was no apparent damage to the back except some surface cracking of the cemented backfill. No crew present.